Sonic the Hedgehog 4: Episode II is a 2-D platformer for next-gen consoles, and marks the 2nd episode of Sonic the Hedgehog 4 and is currently under early development. It was announced saying it will have new zones and bosses and many other things we haven't seen before plus it was said that thanks to the sales of Sonic the Hedgehog 4: Episode I the game will likely have a bigger budget. It is tied into Sonic CD in an unknown way, but Sonic CD is defined as the game's spiritual prequel. There will also be a new physics system in the game since Ken Balough said fans gave bad reviews over the physics in Sonic the Hedgehog 4: Episode I as well as a brand new graphics engine. Additionally, Tails will return as a playable character.